package com.songyl.MapLearn;

import java.util.HashMap;

public class HaseMapDemo {
    public static void main(String[] args) {
        //HaseMap相同主键的覆盖特性
        HashMap map = new HashMap(8,0.01f);
        map.put(null,null);
        map.put(54,"null");
        map.put(null,"n111ull");
        map.put(1,"nul111l");
        map.put(1,"n111ull");


        System.out.println(map);
    }
}
